William Manning Haenszel (June 19, 1910 – March 13, 1998) was an American epidemiologist who developed the first national system to track cancer cases and their possible causes (Surveillance, Epidemiology, and End Results or SEER).
[1] He worked at the National Cancer Institute from 1952 to 1976, when he became a Professor of Epidemiology at the University of Illinois.
With Nathan Mantel, he co-authored the Mantel–Haenszel statistical test for omitted variables.
[2] Haenszel was born on June 19, 1910, in Rochester, New York.
in sociology and mathematics from the University of Buffalo in 1931 and his M.A.